Section 372.20 - Process for modifying covered chemicals and facilities(a) Request to add a facility to the TRI list of covered facilities.(b) The Administrator, on his own motion or at the request of a Governor of a State (with regard to facilities located in that State) or a Tribal Chairperson or equivalent elected official (with regard to facilities located in the Indian country of that Tribe), may apply the requirements of section 313 of Title III to the owners and operators of any particular facility that manufactures, processes, or otherwise uses a toxic chemical listed under subsection (c) of section 313 of Title III if the Administrator determines that such action is warranted on the basis of toxicity of the toxic chemical, proximity to other facilities that release the toxic chemical or to population centers, the history of releases of such chemical at such facility, or such other factors as the Administrator deems appropriate.(c) Petition to add or delete a chemical from TRI list of covered chemicals.(d)In general.(1) Any person may petition the Administrator to add or delete a chemical to or from the list described in subsection (c) of section 313 of Title III on the basis of the criteria in subparagraph (A) or (B) of subsection (d)(2) and (d)(3) of section 313 of Title III. Within 180 days after receipt of a petition, the Administrator shall take one of the following actions:(i) Initiate a rulemaking to add or delete the chemical to or from the list, in accordance with subsection (d)(2) or (d)(3) of section 313 of Title III.(ii) Publish an explanation of why the petition is denied.(2)State and Tribal petitions. A State Governor, or a Tribal Chairperson or equivalent elected official, may petition the Administrator to add or delete a chemical to or from the list described in subsection (c) of section 313 of Title III on the basis of the criteria in subparagraph (A), (B), or (C) of subsection (d)(2) of section 313 of Title III. In the case of such a petition from a State Governor, or a Tribal Chairperson or equivalent elected official, to delete a chemical, the petition shall be treated in the same manner as a petition received under paragraph (d)(1) of this section. In the case of such a petition from a State Governor, or a Tribal Chairperson or equivalent elected official, to add a chemical, the chemical will be added to the list within 180 days after receipt of the petition, unless the Administrator:(i) Initiates a rulemaking to add the chemical to the list, in accordance with subsection (d)(2) of section 313 of Title III, or(ii) Publishes an explanation of why the Administrator believes the petition does not meet the requirement of subsection (d)(2) of section 313 of Title III for adding a chemical to the list.77 FR 23418, Apr. 19, 2012